Driving method of projection device for sleep aid and projection device

Abstract

The application relates to a driving method for sleep-aiding projection and a projection device thereof. The method comprises the following steps: acquiring an ambient illuminance value of an environment where the projection light source is not driven as a first ambient illuminance value; acquiring a first target ambient illuminance value of the environment where the projection light source is located; when the first ambient illuminance value is smaller than the first target ambient illuminance value, controlling the projection device to start a light sleep-aiding function; sequentially lighting each sub-light source by using the same driving parameter, and acquiring a second ambient illuminance value of each sub-light source when the sub-light source is separately lighted to form a data set; acquiring a preset number of sub-light sources corresponding to the second ambient illuminance value with the highest ambient illuminance value in the data set as target sub-light sources; acquiring a target driving parameter of the target sub-light source according to the first target ambient illuminance value; and driving the target sub-light source according to the target driving parameter. The method can reduce noise and power consumption in the sleep-aiding process of the projection device.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of projection technology, in particular to a driving method for sleep-aiding of a projection device and the projection device. BACKGROUND

[0002] With the development of society, the number of people with sleep disorders is increasing. More and more people have sleep problems, and many people have difficulty falling asleep. Therefore, more and more products with sleep-aiding function are emerging.

[0003] Among the sleep-aiding products on the market, there are many electronic products, but most of them are concentrated in light source devices and sound devices, as well as wearable devices. The light source devices have special lamps or other household appliances with light. Such products are either purchased and controlled separately or used in inappropriate scenes, and the experience is not good. The projection device has the advantages of large light source and large sound, and is close to the user's position during use. Therefore, it is a good choice to use the light source function and sound function of the projection device for sleep-aiding.

[0004] However, the traditional projection device has high power consumption and high noise during operation, so it cannot avoid the problems of high noise, light stimulation and high power consumption when directly playing sleep-aiding music or emitting specific light for sleep-aiding. SUMMARY

[0005] Therefore, it is necessary to provide a driving method for sleep-aiding of a projection device and the projection device to reduce the noise and power consumption during sleep-aiding of the projection device.

[0006] A driving method for sleep-aiding of a projection device, the projection device comprising a projection light source, the projection light source comprising a plurality of sub-light sources, the driving method comprising:

[0007] obtaining an ambient illuminance value of an environment in which the projection light source is located when the projection light source is not driven as a first ambient illuminance value;

[0008] obtaining a first target ambient illuminance value of an environment in which the projection light source is located;

[0009] when the first ambient illuminance value is less than the first target ambient illuminance value, controlling the projection device to start a light sleep-aiding function;

[0010] using the same driving parameters to light up each sub-light source in turn, and obtaining a second ambient illuminance value of each sub-light source when it is individually lighted up to form a data set;

[0011] obtaining a preset number of sub-light sources corresponding to the second ambient illuminance value with the highest ambient illuminance value in the data set as target sub-light sources;

[0012] generating a target driving parameter of a target sub-light source according to the first target ambient illuminance value;

[0013] driving the target sub-light source to emit light according to the target driving parameter.

[0014] In one of the embodiments, the driving the target sub-light source to emit light according to the target driving parameter comprises:

[0015] driving one target sub-light source to emit light according to the target driving parameter;

[0016] obtaining a third ambient illuminance value of the environment;

[0017] when the third ambient illuminance value is less than the first target ambient illuminance value, increasing the number of the target sub-light sources to emit light according to a data set of a second ambient illuminance value, obtaining a latest third ambient illuminance value, until the third ambient illuminance value is greater than or equal to the first target ambient illuminance value.

[0018] In one of the embodiments, the sequentially driving the sub-light sources to emit light with the same driving parameter and obtaining the second ambient illuminance value of each sub-light source when it is separately driven to form the data set comprises:

[0019] driving the sub-light source to emit light with a first preset power, the first preset power being 1 / 4-1 / 2 of the rated power; or

[0020] completing the sequential driving process of the sub-light sources with a first preset period, the first preset period being 0.01-1 second.

[0021] In one of the embodiments, the method further comprises:

[0022] adjusting the target driving parameter as a latest driving parameter according to the difference between the third ambient illuminance value and the first target ambient illuminance value,

[0023] driving all the target sub-light sources to emit light according to the latest driving parameter and obtaining a fourth ambient illuminance value corresponding thereto;

[0024] when the fourth ambient illuminance value is greater than the first target ambient illuminance value, continuously adjusting the target driving parameter to be lower as the latest driving parameter and returning to execute the step of driving all the target sub-light sources to emit light according to the latest driving parameter and obtaining the fourth ambient illuminance value corresponding thereto, until the numerical difference between the fourth ambient illuminance value and the first target ambient illuminance value is within 10%;

[0025] taking the latest driving parameter at the end of the adjustment as the target driving parameter of the target sub-light source.

[0026] When the fourth ambient illuminance value is less than the first target ambient illuminance value, if a numerical difference between the fourth ambient illuminance value and the first target ambient illuminance value is within 10%, the adjustment is ended, and the latest driving parameter at the end of the adjustment is taken as the target driving parameter of the target sub-light source.

[0027] In one of the embodiments, each of the target sub-light sources comprises a red light source, a green light source and a blue light source.

[0028] The target driving parameter of each target sub-light source comprises a first target driving parameter of a red light source in the target sub-light source and a second target driving parameter of a green light source in the target sub-light source.

[0029] The target driving parameter of each target sub-light source comprises a first target driving parameter of a red light source in the target sub-light source and a second target driving parameter of a green light source in the target sub-light source.

[0030] In one of the embodiments, the method further comprises:

[0031] When the first ambient illuminance value is greater than or equal to the first target ambient illuminance value, the projection device is controlled to close the light sleep-aiding function, not to drive the sub-light source, and only to open the music sleep-aiding function to play sleep-aiding music; or

[0032] When the first ambient illuminance value is greater than the system preset illuminance value, the projection device is controlled to close the light sleep-aiding function, not to drive the sub-light source, and only to open the music sleep-aiding function to play sleep-aiding music.

[0033] In one of the embodiments, the method further comprises:

[0034] The sleep state of the user is acquired, and when the sleep state of the user is a preset sleep state, the light source is controlled to enter the screen-off display mode; or

[0035] When the sleep state of the user cannot be acquired, when the running time of the projection device in the sleep-aiding mode in the light-aiding sleep mode reaches a preset time length, the light source is controlled to enter the screen-off display mode.

[0036] In one of the embodiments, the driving of the target sub-light source according to the target driving parameter further comprises:

[0037] The music sleep-aiding function is started, and preset music is synchronously played; or

[0038] The configuration information of the user is acquired, and whether the preset music is synchronously played is determined according to the configuration information or the playing source of the preset music is determined according to the configuration information.

[0039] The preset music is music with a preset effect.

[0040] In one embodiment, further comprising:

[0041] acquiring an operating temperature of the projection light source;

[0042] driving the heat dissipation device at a rotational speed having a preset variation rule when the operating temperature is greater than a preset temperature value.

[0043] A projection device, comprising a projection light source, a memory and a processor, the memory storing a computer program, so that the processor executes the computer program to perform the method of any one of the preceding embodiments.

[0044] The driving method of the projection device for sleep assistance can first acquire an ambient illuminance value when the projection light source is not driven as a first ambient illuminance value, and acquire a first target ambient illuminance value in the environment, and only when the first ambient illuminance value is less than the first target ambient illuminance value, the light sleep assistance function is started, so as to avoid the waste of electric energy when the ambient light intensity is high, and the light sleep assistance function is started, but the sleep assistance effect cannot be actually formed. After starting the light sleep assistance function, the predetermined driving parameters are used to light the sub-light sources in turn, and the second ambient illuminance value of each sub-light source when it is individually lighted is acquired. The illuminance value is a data set corresponding to the number of sub-light sources, and the system can determine the target sub-light source according to the detected second ambient illuminance value data set, and drive the target sub-light source according to the acquired target driving parameter, so as to make the ambient illuminance value greater than or equal to the first target ambient illuminance value under the illumination of the target sub-light source, so as to meet the light sleep assistance effect to meet the use demand of the user. The above method can select a proper number of sub-light sources according to the actual situation, and drive the sub-light sources with appropriate driving parameters, so as to form the target ambient illuminance value with appropriate power consumption, so as to meet the use demand of the user and reduce the power consumption in the running process. And because the power consumption is reduced, the running of the heat dissipation device can be reduced, and the noise in the running process is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0045] Figure 1 It is a structure block diagram of the projection device in one embodiment.

[0046] Figure 2 It is a flow chart of the driving method of the light source in one embodiment.

[0047] Figure 3 It is a specific flow chart of step S270 in one embodiment.

[0048] Figure 4 It is a specific flow chart of step S260 in one embodiment.

[0049] Figure 5A specific flowchart for step S260 in another embodiment.

[0050] Figure 6 A partial flowchart for the driving method of the light source in another embodiment. DETAILED DESCRIPTION

[0051] An embodiment of the present application provides a driving method for a projection device to assist sleep. The method can be applied to all projection devices or devices with projection functions to drive the projection device to achieve the purpose of assisting sleep by using the projection device. The driving method is executed in a light sleep assistance mode of the projection device. The light sleep assistance mode of the projection device includes a light sleep assistance function or both the light sleep assistance function and a music sleep assistance function. In addition to the projection light source, the projection device is also provided with various functional modules and other auxiliary functional modules to realize the functions of the device itself, such as an illuminance sensor, a display system, a memory, a processor, a human-computer interaction interface, a sound system, and a heat dissipation system, and the like, as shown in FIG. 1. In this embodiment, the projection light source in the projection device includes a plurality of sub-light sources, each of which can be independently driven to light up for illumination or projection. Specifically, the light source can adopt a Local dimming (area dimming) illumination system and a field sequential display method. The embodiment provides a driving method for a projection device to assist sleep, which can completely realize light source driving, adjust the light intensity according to the ambient illuminance, and dynamically adjust the actual situation of the environment and the operation of the device from the start to the end of the entire sleep assistance process, so as to achieve the actual effect of sleep assistance. Figure 1

[0052] Figure 2 The driving method for the light sleep assistance of the projection device in an embodiment includes the following steps:

[0053] In step S210, an ambient illuminance value of an environment in which the projection light source is located when the projection light source is not driven is obtained as a first ambient illuminance value.

[0054] The ambient illuminance value of the environment in which the projection light source is located can be obtained by detecting the environment by the illuminance sensor of the projection device itself. In other embodiments, the projection device can not be provided with an illuminance sensor, but the projection device can interact with other smart home devices to obtain the ambient illuminance value detected by the illuminance sensor in the other smart home devices as the first ambient illuminance value. The first ambient illuminance value is the local ambient illuminance.

[0055] It can be understood that the projection device will execute step S210 only when it receives an instruction or determines that the light sleep assistance mode needs to be started according to a self-learning function, that is, the driving method will be started only when the projection device is in the light sleep assistance mode. ​

[0056] Step S220, obtaining a first target ambient illuminance value of an environment where the projection light source is located.

[0057] The first target ambient illuminance value is a sleep-aiding ambient light effect required by a user when the projection light source is working. The first target ambient illuminance value can be set according to the user's preference. The user can configure the parameter in advance. In another embodiment, the first target ambient illuminance value can also be set according to the mode currently required by the projection light source to be turned on. For example, the projection light source can set normal working mode, screen-off display mode, light-aiding sleep mode, night light mode, and the like. The light-aiding sleep mode can include at least one of light-aiding sleep function and music-aiding sleep function, for example, the light-aiding sleep function can be set alone, or the light-aiding sleep function and the music-aiding sleep function can be set simultaneously. The ambient illuminance required or preferred by the user in different modes will also be different, at this time, the mode in which the projection light source is located can be configured. Specifically, the memory of the device can store the target ambient illuminance value corresponding to each mode, so that the target ambient illuminance value can be read as the first target ambient illuminance value after determining the current running mode. In other embodiments, the first target ambient illuminance value can also be manually configured by the user. The user can configure the projection light source through other handheld terminals such as mobile phones, tablets, and the like. For example, in the present driving method, to implement light-aiding sleep, when the first ambient illuminance value is 1.3 Lux, the first target ambient illuminance value can be set to 4 Lux illuminance.

[0058] In an embodiment, the first target ambient illuminance value is 2-6 times, for example, 3 times, of the first ambient illuminance value. Specifically, the user can set the multiple through the internal setting program of the projection device or the APP of the personal terminal device, and the like, according to the needs. Because when the sleep-aiding light is turned on, some people like it a little brighter, and some people like it a little dimmer.

[0059] The order between step S210 and step S220 can be changed, or they can be performed simultaneously.

[0060] Step S230, when the first ambient illuminance value is less than the first target ambient illuminance value, controlling the projection device to turn on the light-aiding sleep function.

[0061] The first ambient illuminance value and the first target ambient illuminance value are compared and judged to know whether the illuminance of the current environment has reached the first target ambient illuminance value. If the first ambient illuminance value is greater than or equal to the first target ambient illuminance value, it indicates that the brightness in the current environment is relatively high, and the user's ambient light shielding condition is not good enough, or the user needs ambient lighting for various reasons, then the light provided by the light-aiding sleep function cannot play a sleep-aiding role, and energy is wasted, so the projection light source does not need to be turned on to save resources.

[0062] In this embodiment, the ambient illuminance value when the projection light source is not driven is collected as the first ambient illuminance value, and the first target ambient illuminance value in the environment is obtained. The light-assisted sleep function is only started when the first ambient illuminance value is less than the first target ambient illuminance value, so as to avoid the waste of electric energy caused by starting the projection light source of the projection device when the ambient light is too high.

[0063] In other embodiments, if the first ambient illuminance value is greater than or equal to the first target ambient illuminance value, the projection device will not be controlled to enter the light-assisted sleep function, but whether to enter the music-assisted sleep function to play music for sleep assistance can be determined according to the user's setting or the system's default value.

[0064] In other embodiments, it can also be directly judged whether the first ambient illuminance value is greater than a preset illuminance value, and when the first ambient illuminance value is greater than the preset illuminance value, the projection device is controlled to not start the light-assisted sleep function and to start the music-assisted sleep function to play sleep-assisting music. The preset illuminance value can be greater than the first target ambient illuminance value. For example, the preset illuminance value can be 8 Lux, that is, when the ambient illuminance is greater than this illuminance, the light-assisted sleep function is not started.

[0065] In step S240, each sub light source is sequentially lit by using the same driving parameter, and a second ambient illuminance value of each sub light source when it is individually lit is obtained to form a data set.

[0066] Each sub light source is sequentially lit by using the same driving parameter, and the second ambient illuminance value of the environment when each sub light source is individually lit is recorded, so as to obtain a data set. Therefore, the difference in light illuminance generated under the same driving parameter can be determined according to the second ambient illuminance value when each sub light source is individually lit, so as to serve as a reference basis for selecting the target sub light source. Because the user may change the projection direction of the projector during the projection light source sleep assistance stage, the light projected by the lens will be projected to many areas, which can be walls, curtains or ceilings, so that the ambient illuminance caused thereby will be different. It is also possible that the position of the device is different during sleep, so that when the sub light source is lit, the brightness obtained is different due to the different reflection of the sub light source corresponding to the projection picture position.

[0067] In this step, the driving parameter can be driving power, which can be set by setting the duty cycle of the PWM signal driving the projection light source. The driving parameter can be set as needed, such as setting it as the rated driving parameter of each sub-light source, or setting it as other driving parameters, as long as it is driven with the same driving parameter. The lighting sequence of each sub-light source does not need to be strictly limited, as long as each sub-light source can be individually lit. For example, it can be lit in sequence according to the position of each sub-light source, or it can be lit in a random order.

[0068] In an embodiment, when driving each sub-light source to light up, the output light of the sub-light source is controlled to be pure green. Since the brightness may be too high to help sleep, the brightness is controlled and the driving time is shortened as much as possible to avoid excessive light, which reduces the stimulation of the human eye, i.e. step S240 is a flash and does not affect the sleep process of the person too much. Specifically, the sub-light source can be driven to produce light illumination with a lower driving power. For example, the first preset power is used to drive, and the first preset power can be 1 / 4 to 1 / 2 of the rated power. In other embodiments, the sequential lighting process of each sub-light source in the projection light source can be completed quickly, such as driving with a first preset period, and the first preset period can be 0.01 seconds to 1 second.

[0069] The light illuminance value in the environment after lighting each sub-light source is obtained as the second environment illuminance value. In an embodiment, multiple sub-light sources can be lit multiple times to obtain multiple corresponding environment illuminance values to obtain a data set.

[0070] In step S250, the sub-light source corresponding to the preset number of second environment illuminance values with the highest environment illuminance value in the data set is obtained as the target sub-light source.

[0071] After obtaining the second environment illuminance value corresponding to each sub-light source under the same driving parameter, the sub-light source with the highest illuminance value in the second environment illuminance value can be determined as the target sub-light source, i.e. the target sub-light source is multiple at this time, such as driving two sub-light sources as target sub-light sources at the same time. In other embodiments, a sub-light source with a second environment illuminance value greater than a preset illuminance value can be determined as the target sub-light source.

[0072] Regardless of the above method for determining, the sub-light source with better light illuminance effect under the same working condition can be selected as the target sub-light source, so that better environmental effect can be obtained with less energy, meeting the application demand while meeting the product low-power demand.

[0073] In step S260, the target driving parameter of the target sub-light source is obtained according to the first target environment illuminance value.

[0074] The target driving parameter of each sub light source can be determined according to the environmental effect to be provided. When each sub light source is the same projection light source structure, the same target driving parameter can be used for driving. In other embodiments, different target driving parameters can be used for driving. Meanwhile, the target driving parameter can also be determined according to the number of target sub light sources to be turned on at the same time. In the present embodiment, only one target sub light source is turned on, and thus the target driving parameter needs to ensure that the light emitted by the target sub light source after driving can make the environmental illuminance value greater than or equal to the first target environmental illuminance value. In other embodiments, if two target sub light sources are turned on at the same time, it is only necessary to ensure that the light emitted by the two target sub light sources can make the environmental illuminance value greater than or equal to the first target environmental illuminance value.

[0075] The preset driving parameter can be set according to an empirical value or according to user preference. For example, if the efficiency of the sub light source is low, the preset driving parameter can be set to be higher, for example, the preset parameter is set to be 40% of the rated parameter, and vice versa, the preset driving parameter can be set to be lower, for example, the preset driving parameter is set to be 20% of the rated driving parameter, etc. The driving parameter can also be the rated parameter of the target sub light source.

[0076] The driving parameter can include driving power, or driving voltage, or driving current. In other embodiments, the projection light source is driven by PWM, that is, the target sub light source is driven by sending a PWM signal. At this time, the preset driving parameter can also include a preset duty cycle, which can be set to 20%. It can be understood that the preset duty cycle can also be set to 5%, 8%, 10% or 15%, etc.

[0077] In step S270, the target sub light source is driven according to the target driving parameter.

[0078] The target sub light source is driven according to the determined target driving parameter, so as to generate corresponding light to form a sleep-aiding environmental illuminance, and the environmental illuminance value is greater than or equal to the first target environmental illuminance value, so that the projection light source effect formed after the projection light source is turned on meets the current sleep-aiding demand. In the turning-on process, the system will turn on the plurality of target sub light sources in a preset order according to temperature control or specific setting. The preset turning-on order can be defined by the user or automatically set by the system according to self-learning function, so as to obtain a better sleep-aiding effect of the projection device.

[0079] The driving method for the sleep-aiding projection device can first collect an ambient illuminance value when the projection light source is not driven as a first ambient illuminance value, and obtain a first target ambient illuminance value in the environment, and only when the first ambient illuminance value is less than the first target ambient illuminance value, the light sleep-aiding function is started, so as to avoid the waste of electric energy caused by starting the projection light source of the projection device when the ambient light is too high. After the light sleep-aiding function is started, the same driving parameters are used to light up each sub-light source in turn, and a second ambient illuminance value of each sub-light source when it is separately lighted up is obtained, so as to determine a target sub-light source according to the detected second ambient illuminance value, and light up each target sub-light source in turn according to the obtained target driving parameters, so that the ambient illuminance value is greater than or equal to the first target ambient illuminance value under the action of the target sub-light source, so as to meet the use demand of the user. The above method can obtain a better sleep-aiding effect with less energy, so as to meet the application demand and the low-power demand of the product. In addition, due to the reduced power consumption, the projection device generates less heat, and the operation of the heat dissipation equipment can be reduced, thereby reducing the noise in the operation process.

[0080] It can be understood that after the target sub-light source is lighted up, the ambient illuminance value is detected every preset interval of time, and when the change amount of the ambient illuminance value exceeds the preset value, steps S260 and S270 are re-executed, that is, the target driving parameters of the target sub-light source are re-determined, and the target sub-light source is driven according to the new target driving parameters, so as to realize dynamic adjustment of the ambient illuminance value and meet the environmental light requirement of the user for light sleep-aiding.

[0081] In an embodiment, step S270 can further include a flowchart as shown in Figure 3 , including the following steps:

[0082] Step S271: driving a target sub-light source to light up according to the target driving parameters.

[0083] The lighted-up target sub-light source can be a sub-light source corresponding to the second ambient illuminance value with the highest illuminance value in the data set obtained in step S240.

[0084] Step S272: obtaining a third ambient illuminance value of the environment.

[0085] Step S273: judging whether the third ambient illuminance value is less than the first target ambient illuminance value.

[0086] If yes, it means that one sub-light source cannot meet the requirement, and more target sub-light sources need to be lighted up, and at this time, step S271 and the subsequent steps are returned to execute. If no, it means that the lighted-up target sub-light source can already meet the ambient illuminance requirement, and more sub-light sources do not need to be started.

[0087] That is, when the third ambient illuminance value is less than the first target ambient illuminance value, the number of target sub-sources being lighted is increased until the ambient illuminance value of the ambient environment is greater than or equal to the first target ambient illuminance value.

[0088] In an embodiment, the above method further comprises a sub-process as shown in Figure 4 including the following steps:

[0089] Step S310, adjusting the target driving parameter as a latest driving parameter according to the difference between the third ambient illuminance value and the first target ambient illuminance value.

[0090] In this embodiment, after determining the number of target sub-sources that need to be turned on at the same time, the target driving parameter is adjusted according to the difference between the third ambient illuminance value after all target sub-sources are lighted and the first target ambient illuminance value, as a latest driving parameter. Specifically, when the third ambient illuminance value is greater than the first target ambient illuminance value, and the difference between them is greater than 10%, the current driving parameter needs to be reduced to obtain the latest driving parameter, and the reduction process can be adjusted according to a preset adjustment value (i.e., a preset adjustment step). If the third ambient illuminance value is less than the first target ambient illuminance value, and the difference between them is greater than 10%, the current driving parameter needs to be increased to obtain the latest driving parameter. When the numerical difference between the third ambient illuminance value and the first target ambient illuminance value is within 10%, it can be determined that the current environment meets the needs of the sleep-aiding mode, and the driving parameter does not need to be adjusted. The preset adjustment value can be set according to experience or user preference. For example, when the driving parameter includes the duty cycle of the PWM signal, the preset adjustment value can be set to 3%, 5%, 8%, 10%, or 15%, etc.

[0091] Step S320, driving all lighted target sub-sources according to the latest driving parameter, and obtaining a corresponding fourth ambient illuminance value.

[0092] Step S330, judging whether the numerical difference between the fourth ambient illuminance value and the first target ambient illuminance value is within 10%.

[0093] If yes, it means that the current ambient illuminance value does not meet the lighting requirements in the sleep-aiding mode, and step S340 is executed, otherwise step S350 is executed.

[0094] Step 340, adjusting the latest driving parameter.

[0095] The adjustment process can refer to step S310, which is not described in detail.

[0096] Step S350, driving each lighted target sub-source with the latest driving parameter at the end of the adjustment.

[0097] The latest driving parameter when the loop is exited is taken as the latest driving parameter for driving each target sub-light source, and each target sub-light source that is lit is driven.

[0098] The method can ensure that the light emitted by the projection light source can meet the use needs of a user, such as generating light that a user feels appropriate in a sleep-aiding mode, and can achieve true sleep aiding without excessively increasing the power of the projection light source. Compared with a scheme of driving with fixed driving parameters, the method can significantly reduce power consumption during operation and achieve the purpose of energy saving.

[0099] In an embodiment, the target sub-light sources include multiple target sub-light sources, such as two, three, or more than four target sub-light sources.

[0100] In an embodiment, when the target sub-light sources are driven according to the target driving parameters, each target sub-light source can be lit in turn according to a preset lighting sequence, that is, each target sub-light source can be lit alternately, so that each target sub-light source is not in the lit state for a long time, heat accumulation is avoided, power balance of the device is easily achieved, the entire device can be ensured to operate in a low-power state, driving time of a heat dissipation device such as a fan can be reduced, noise and energy loss caused by the fan can be reduced, and the purpose of energy saving is truly achieved.

[0101] It can be understood that in an embodiment, the target sub-light sources can correspond to different projection regions, so that during the alternation of the target sub-light sources, a picture alternation dynamic display is generated, which helps to improve the display effect. For example, when the projection light source is in a sleep-aiding mode, each target sub-light source can project according to a preset rule, so as to generate a corresponding projection picture track, the track can guide the user's line of sight to move, and a better sleep-aiding effect is achieved.

[0102] In another embodiment, the projection pictures of the target sub-light sources can also not be completely the same, so that after each target sub-light source is lit in turn, an image track with a target display effect is projected. Taking a sleep-aiding mode as an example, the projected picture can be a picture with a hypnotic effect, each picture can be displayed according to a natural scene change rule, so as to simulate a natural scene effect. For example, the corresponding picture can be a sun or a moon, so that the position is switched through switching of each target sub-light source, and then an effect of the sun or the moon rising in the east and setting in the west is presented. For another example, each picture can also be a picture of sea waves, the position is switched through switching of each target sub-light source, and then a dynamic picture effect of ebb and flow of the tides is generated to achieve the purpose of sleep aiding.

[0103] In other embodiments, each target sub-light source can also be switched randomly.

[0104] In an embodiment, when the target sub-light source is driven to display, the gray scale value of the projection picture of the target sub-light source can also be controlled to be less than a preset gray scale value. When the gray scale value is small, the picture is a picture with high transmittance, so that the display area can have more transmitted light, thereby ensuring the highest display brightness at the lowest power consumption. In an embodiment, the gray scale value of the projection picture corresponding to each target sub-light source can be set to a picture with overall transmittance, i.e., a picture with a gray scale of zero, so that the display area can have the highest transmittance and the highest brightness at the lowest power consumption. Similarly, in the case of reduced power consumption, the use frequency of the cooling fan can be reduced, thereby reducing the noise during the operation of the projection light source.

[0105] In an embodiment, each target sub-light source includes a red light source, a green light source, and a blue light source. By adjusting the light emission of the red light source, the green light source, and the blue light source, the color of the light emitted by the target sub-light source can be adjusted. Specifically, whether the three projection light sources need to be turned on at the same time can be determined according to the required operation mode of the projection light source. For example, when the light illumination sleep aid mode is currently in use, when the target sub-light source is driven, only the red light source and the green light source in the target sub-light source are driven to be lit, thereby forming orange-red light that is conducive to sleep, and the blue light source that affects the sleep aid effect is not lit.

[0106] Specifically, when the target driving parameter of the target sub-light source is obtained, a first target driving parameter for driving the red light source in the target sub-light source and a second target driving parameter for driving the green light source in the target sub-light source are obtained respectively.

[0107] The first target driving parameter and the second target driving parameter can be obtained according to the target driving parameter of the target sub-light source. After the red light source and the green light source are driven by the first target driving parameter and the second target driving parameter, it is necessary to ensure that the light generated by the target sub-light source can make the ambient illuminance value reach the first target ambient illuminance value. In this embodiment, by setting the first target driving parameter and the second target driving parameter, the proportion of the red light and the green light in the light generated by the target sub-light source can be controlled, and the proportion of the light flux of the two is controlled within a preset light flux proportion range, so that the generated ambient effect is in a state that is more suitable for the user, and thus it is more helpful for the user to fall asleep. In an embodiment, the above-mentioned preset light flux proportion range can be adjusted by setting the first target driving parameter and the second target driving parameter. Specifically, the first target driving parameter and the second target driving parameter satisfy a preset proportion relationship, and the generated light color has a good sleep-aiding effect on the user. In other embodiments, the proportion relationship can also be set by the user. According to the light efficiency ratio of the red light source and the green light source, when the projection light source adopts the LOCAL DIMMING lighting system, the red light source R and the green light source G can be driven according to the corresponding power, so that the light flux can be proportionally configured. In this way, the projected picture can have a specific color, thereby helping to meet the use demand in a specific scene.

[0108] In another embodiment, step S260 can also be implemented as shown in the flow Figure 5 , including the following steps:

[0109] In step S410, the light illuminance of the target sub-light source is obtained according to the first target ambient illuminance value.

[0110] The first target ambient illuminance is determined according to the mode in which the current projection light source is located. For example, when sleep-aiding is needed, the ambient illuminance value that needs to be controlled during sleep-aiding is taken as the first target ambient illuminance value. For example, it is determined that the ambient illuminance value in the sleep-aiding mode is M.

[0111] Generally, there is a corresponding relationship between the light illuminance of the target sub-light source and the ambient illuminance value after projection. At this time, the corresponding relationship needs to be obtained, and the corresponding relationship also needs to be set according to the current scene. Taking the sleep-aiding scene as an example, the light illuminance of the target sub-light source is equal to N*M, N is a preset multiple relationship, and the multiple relationship is obtained according to a calculation relationship or empirical data. Only when the illuminance of the sleep-aiding light reaches a preset threshold, the final ambient brightness generated thereby can produce a suitable final ambient brightness, and finally has a sleep-aiding effect.

[0112] In an embodiment, N=2-6, and the value of N can be selected according to the user.

[0113] In an embodiment, N can also be directly set as 3 or 5. For example, when the user does not make a setting, the system default data is used as the value of N.

[0114] In step S420, the target driving parameter of the target sub light source is obtained according to the first target environment illumination value and the light illumination.

[0115] The target driving parameter includes a target driving power. According to a preset relationship, the final target driving power P of the target sub light source can be determined as F(M*N), and F is a function relationship between the corresponding illumination and power. The function can be set according to different projection light sources.

[0116] In an embodiment, the above method can further include the following steps after step S270: obtaining the sleep state of the user, and when the sleep state of the user is a preset sleep state, controlling the projection device to enter a screen-off display mode, and at this time, the driving state of the light source is a sub light source in the screen-off display mode, and the driving method is different from the light illumination sleep aid mode. During the use of the projection light source, the sleep state of the user can be adjusted, for example, when the user is in a sleep state, the target sub light source can be controlled to enter the screen-off display mode sub light source, thereby avoiding waste of electric energy. In an embodiment, the sleep state of the user can be obtained by interacting with a wearable device. Specifically, the projection light source can communicate with the wearable device in a wired or wireless manner, or the wearable device and the projection light source can both communicate with the main control system, thereby realizing data interaction between each other. The wearable device can be a smart bracelet, a smart eye cover, etc.

[0117] In other embodiments, when the sleep state of the user cannot be obtained, whether the projection light source needs to be turned off can also be determined according to the running time of the light illumination sleep aid mode, for example, when it is detected that the running time of the current light illumination sleep aid mode has reached or exceeded a preset time length, the projection device is controlled to enter a screen-off display mode, and the driving mode of the projection light source and the sound device is changed accordingly. In the screen-off display mode, the projection device displays time, temperature, etc. information or system default information in a specific area in a specific manner, or all projection light sources and projection screens are turned off. In other embodiments, after the target sub light source is turned off, the super energy-saving mode of shutdown or standby is entered.

[0118] In other embodiments, the sleep state of the user does not need to be determined, and the running time is directly used as a monitoring object. When the running time reaches a preset time length, the projection device is controlled to enter a screen-off display mode.

[0119] In an embodiment, the device further acquires noise information in the environment. The activity information of the user can be determined by the noise information. For example, when it is detected that the noise information in the environment meets a preset condition, the target sub-light source is driven to work, so that the ambient illuminance value in the environment exceeds a second target ambient illuminance value. The second target ambient illuminance value can be the same as or different from the first target ambient illuminance value. For example, when the projection light source is turned off in the light-assisted sleep mode or in the screen-off display mode, if it is detected that the decibel of the noise information in the environment is greater than a preset decibel value, it can be determined that the user gets up, so that the projection light source is started to make the illuminance of the ambient background light reach the second target ambient illuminance value, to meet the use needs of the user. If the detected noise information is lower than the threshold value, it is confirmed that the user is in a sleep state, and then the brightness of the light emitted by the target sub-light source can be gradually reduced, or the projection light source can be directly turned off to enter a sleep mode. In an embodiment, the target sub-light source is driven synchronously, and preset music is played synchronously, that is, the light-assisted sleep function and the music-assisted sleep function are started simultaneously in the sleep-assisted mode. The preset music can be music with a preset effect, such as music with a hypnotic effect. For example, the music can be white noise, a light sea wave sound or soothing music, or other music matched with the picture projected by the projection light source, that is, the music and the picture are synchronized. The synchronous playing of the music can be realized by a music player of the device where the projection light source is located, or the music synchronous playing function can be realized by networking control of other devices.

[0120] In another embodiment, the configuration information of the user can also be acquired, so as to determine whether the preset music is played synchronously according to the configuration information of the user. If the user configuration information is to be played synchronously, the preset music is played synchronously, and if not, the music is not played synchronously. In other embodiments, the playing source of the music can also be acquired according to the configuration information, that is, the configuration information contains information such as the playing source of the music, for example, the playing source of the music can be music of a certain music website. The function can be controlled and operated by an APP of a mobile terminal, or by an operation button on the projection device, a remote control device, and the like.

[0121] In an embodiment, the above method further includes the following steps, as shown in Figure 6 The steps include the following steps:

[0122] Step S610, acquiring the running temperature of the projection light source

[0123] The running temperature of the projection light source in the running process can be acquired by a temperature detector.

[0124] Step S620, determining whether the running temperature is greater than a preset temperature value.

[0125] When the running temperature is greater than the preset temperature value, the heat dissipation device needs to be started to dissipate heat, so as to avoid the projection light source from being burned out due to the high temperature. In this case, step S630 is executed, otherwise, step S610 is executed to continue monitoring the running temperature of the projection light source.

[0126] Step S630: driving the heat dissipation device at a rotating speed with a preset change rule.

[0127] The preset change rule can be obtained through system self-learning or directly configured by a user. By driving the heat dissipation device at the rotating speed with the preset change rule instead of a constant rotating speed, the heat dissipation device can be used as a sound source to generate the required noise to achieve the sleep-aiding effect. In this case, the heat dissipation device can not only dissipate heat but also serve as a noise sound source to aid sleep. The heat dissipation device can be a fan or the like.

[0128] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be completed by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer readable storage medium and can include the processes of the above-mentioned embodiments when executed. Any reference to memory, storage, database or other medium in the embodiments provided by the present application can include non-volatile and / or volatile memory. The non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. The volatile memory can include random access memory (RAM) or external cache memory. As an illustration but not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM) and memory bus dynamic RAM (RDRAM) and the like.

[0129] Accordingly, in one embodiment, a computer readable storage medium is provided, which stores a computer program. When the computer program is executed by a processor, the steps of the above-mentioned method are implemented.

[0130] An embodiment of the present application further provides a projection device, which comprises the sleep-aiding system. Figure 1As shown, the device comprises a projection light source, a memory and a processor, the memory storing a computer program, so that the processor executes the computer program to perform the method in any of the preceding embodiments.

[0131] The technical features of the above embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combination of the technical features does not result in contradictions, it shall be considered within the scope of the present disclosure.

[0132] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it shall not be understood as a limitation on the scope of the patent. It should be pointed out that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these shall be within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A driving method for a projection device to aid sleep, the projection device comprising a projection light source, the projection light source comprising a plurality of sub-light sources, characterized in that, The driving method comprises: obtaining an ambient illuminance value of an environment in which the projection light source is located when the projection light source is not driven as a first ambient illuminance value; obtaining a first target ambient illuminance value of an environment in which the projection light source is located; when the first ambient illuminance value is less than the first target ambient illuminance value, controlling the projection device to turn on a light-assisted sleep function; using the same driving parameters to sequentially light up each sub-light source, and obtaining a second ambient illuminance value of each sub-light source when it is individually lighted up to form a data set; obtaining a preset number of sub-light sources corresponding to the second ambient illuminance value with the highest ambient illuminance value in the data set as target sub-light sources; generating a target driving parameter of the target sub-light source according to the first target ambient illuminance value; driving the target sub-light source according to the target driving parameter, comprising: driving one target sub-light source according to the target driving parameter; obtaining a third ambient illuminance value of the environment; when the third ambient illuminance value is less than the first target ambient illuminance value, increasing the number of target sub-light sources that are lighted up according to the data set of the second ambient illuminance value to obtain a latest third ambient illuminance value until the third ambient illuminance value is greater than or equal to the first target ambient illuminance value; adjusting the target driving parameter as a latest driving parameter according to the difference between the third ambient illuminance value and the first target ambient illuminance value; driving all the target sub-light sources that are lighted up according to the latest driving parameter, and obtaining a corresponding fourth ambient illuminance value; when the numerical difference between the fourth ambient illuminance value and the first target ambient illuminance value is greater than 10%, adjusting the latest driving parameter and returning to execute the step of driving all the target sub-light sources that are lighted up according to the latest driving parameter and obtaining a corresponding fourth ambient illuminance value until the numerical difference between the fourth ambient illuminance value and the first target ambient illuminance value is within 10%; driving each target sub-light source that is lighted up with the latest driving parameter at the end of the adjustment.

2. The driving method of claim 1, wherein the sleep-aiding projection device is a light emitting diode (LED) device. The step of using the same driving parameters to sequentially light up each sub-light source and obtaining a second ambient illuminance value of each sub-light source when it is individually lighted up to form a data set comprises: driving the sub-light source to generate light illumination at a first preset power, the first preset power being 1 / 4 to 1 / 2 of the rated power; or completing the sequential lighting process of each sub-light source at a first preset period, the first preset period being 0.01 seconds to 1 second.

3. The driving method of claim 1, wherein the sleep-aiding projection device is a light emitting diode (LED) device. Each of the target sub-light sources comprises a red light source, a green light source and a blue light source; The step of obtaining the target driving parameter of each target sub-light source comprises: obtaining a first target driving parameter of the red light source in the target sub-light source and a second target driving parameter of the green light source in the target sub-light source; The step of driving the target sub-light source according to the target driving parameter comprises: driving the red light source according to the first target driving parameter and driving the green light source according to the second target driving parameter.

4. The driving method of claim 1, wherein the sleep-aiding projection device is a light emitting diode (LED) device. Further comprising: when the first ambient illuminance value is greater than or equal to the first target ambient illuminance value, controlling the projection device to turn off the light-assisted sleep function, not to drive the sub-light source, and only to turn on a music-assisted sleep function to play sleep-assisted music; or When the first ambient illuminance value is greater than a system preset illuminance value, the projection device is controlled to turn off the light sleep-aiding function, not to drive the sub-light source, and only to turn on the music sleep-aiding function to play sleep-aiding music.

5. The driving method of claim 1, wherein the sleep-aiding projection device is a light emitting diode (LED) device. Further comprising: Obtaining a sleep state of the user, and when the sleep state of the user is a preset sleep state, controlling the light source to enter an off-screen display mode; Or When the sleep state of the user cannot be obtained, when the running time of the projection device in the sleep-aiding mode entering the light sleep-aiding mode reaches a preset time length, the light source is controlled to enter the off-screen display mode.

6. The driving method of claim 1, wherein the sleep-aiding projection device is a light emitting diode (LED) device. The driving of the target sub-light source according to the target driving parameter further comprises: Starting a music sleep-aiding function and synchronously playing preset music; or Obtaining configuration information of the user, determining whether to synchronously play preset music according to the configuration information or determining a playing source of the preset music according to the configuration information; The preset music is music with a preset effect.

7. The driving method of claim 1, wherein the sleep-aiding projection device is a light emitting diode (LED) device. Further comprising: Obtaining a running temperature of the projection light source; When the running temperature is greater than a preset temperature value, driving the heat dissipation equipment at a speed with a preset change rule.

8. A projection apparatus, characterized by comprising: The projection light source, the memory and the processor, the memory storing a computer program, so that the processor executes the computer program to execute the method of any one of claims 1 to 7.

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